Which statement is true?1 pointA tuple corresponds to a row in a table.A relation variable is inherently a specific set of values.A relation can have different values ar different times.None of the listed options

orrect answer__________ is a specific domain in the relation which has entries of all tuples.

Which of the following is not a restriction for a table to be a relation? The cells of the table must contain a single value. All of the entries in any column must be of the same kind The columns must be ordered. No two rows in a table may be identical

What is a tuple?Select one:a.A field in a relationb.An index on a tablec.A way for a database to store tablesd.A collection of attributes of a relation

A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.Question 3Answera.Fieldsb.Keyc.Attributed.Rows

The elements of the domain of an attribute may be ordered pairs of values. True False0.5 pointsSome relations may not have a foreign key. True False0.5 pointsA foreign key in a relation should consist of exactly one attribute. True False0.5 pointsA foreign key in a relation R can NOT be used to refer to tuples in R itself. True False